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Whiteline Complete Watts Link Rear Suspension (05-14 Coupe)

Item 54111
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      Review & Installation Video

      Hey I’m Justin with, and I have with me possibly one of the best live axle handling modification you can do, thanks to Whiteline’s Watts link rear suspension setup, fitting all 2005 and newer Mustangs. The Mustang’s solid rear axle has unfairly been the subject of much criticism over the years, and is oftentimes considered to be the weak point of handling performance. The truth is, the modern live axle can be just as good as an independent rear setup, given a little help, that help comes in the form of this Watts link from Whiteline. The Watts link is designed to replace the factory Panhard setup in your Mustang and prevent any lateral or side to side movement of a rear axle. Even though the Watts link and the Panhard bar are essentially one of the same, the Watts link is a far superior design. The Panhard bar mounts to one end of the chassis, and connects to the far side of the axle, and while yes, this does do a great job of preventing any lateral movement, the Panhard bar does have one flaw, vertical movement. When the suspension moves up and down, the Panhard bar has the tendency to move in an arc, rather than up and down, this can result in an varying roll center which basically translates into less handling predictability, coming into or out of a turn. The design of Whiteline’s Watts link allows the rear axle to move up and down, thanks to these 2 arms that mount to each side of the chassis, and pivot right here at the diff cover. This allows the roll center to remain constant no matter what the car is doing, turning, centering, it all translates to increased handling predictability, and a more stable, planted rear end. Taking a closer look you can see this total package from Whiteline is no joke, almost the entire thing has been constructed using quality 4130 chromoly steel, and features Whiteline’s unique elastomer bushings. Perhaps one of the biggest features of this kit besides the full adjustability, is the fact that it includes a brand new diff cover, making this product a 100% bolt on affair. Because this kit does bolt on, the install really isn’t all that bad, and can be accomplished in the garage on a Saturday or Sunday afternoon. Keep in mind, since the factory diff cover will be coming off, make sure you have a drain can on you to capture all that fluid when you do crack the pumpkin. With that said, make sure you have a couple of quarts of fluid to fill the diff back up when everything is installed. When it’s all said and done, you should be wrapped up in about 4 or 5 hours. So if you’re the type of Mustang owner who prefers the twisty back roads or autocross track to the drag strip, and you want to take your live axle car to the next level, then be sure to check out this complete Watts link system from Whiteline, available right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Keeps Axle Centered for Predictable Handling
      • Perfect for Street and Track Cars
      • Replaces Panhard Bar and Rear Brace
      • Adjustable Ride Height
      • Synthetic Elastomer Bushings
      • 100% Bolt On, No Welding Required
      • Fits All 2005 to 2014 Mustang Coupes


      Perfect For Street And Track. The Whiteline Watts Link Rear Suspension allows the axle to move up and down in a true vertical plane keeping it centered under the car, so that your roll center behaves exactly the same in a Left Side turn as it does in a Right Side turn. This allows for predictable and tune-able handling, perfect for street and track cars.

      Adjustable. Whiteline designed their Watts Link Rear Suspension Kit to be ride height adjustable so you can precisely dial in your optimum settings through the differential cover and 4130 Chromoly adjustable arms.

      Synthetic Elastomer Bushing. This Whiteline Performance Watts Link Rear Suspension Kit uses Synthetic Elastomer bushings which reduce noise, vibration and rigidity to the rear end without the harshness of commonly used rubber bushings.

      Bolt-on Design. Unlike other Watts Linkage kits on the market the Whiteline Performance kit is a true 100% bolt on with no welding required for installation.

      Application. Designed to fit all 2005 to 2014 Mustang coupes, including the V6, GT, Bullitt and Shelby GT500 models, the Whiteline Performance Complete Watts Link Rear Suspension requires removal of the factory panhard bar and rear brace.

      Fitment: 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

      Whiteline KDT916

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Differential Cover
      • (1) Magnetic Plug
      • (1) Standard Plug
      • (1) Main Brace
      • (1) Center Pivot
      • (2) Swivel Foot Bolts
      • (2) Swivel Foot Retaining nuts
      • (4) M12x30 Bolt
      • (1) M12x20 Bolt
      • (1) M14x80 Bolt
      • (1) M12 Grub Screw
      • (5) M12 Flat Washer
      • (1) M14 Flat Washer
      • (1) Center Pivot Retainer
      • (10) Differential Cover Retaining Bolts
      • (10) Retaining Bolt Washers
      • (2) Linkage Arms
      • (8) Arm Bushings
      • (2) M12x40 Arm Retaining Bolts
      • (2) M12 Flat Washer
      • (2) Center Pivot Arm Retainers
      • (1) Driver Side 37mm Crush Tube
      • (1) Passenger Side 60mm Crush Tube
      • (1) Passenger Side Retainers
      • (1) Passenger Side Brace Spacer
      • (1) Chassis Support Brace
      • (1) Driver Side Drop Bracket
      • (1) M10 Flat Washer
      • (2) M10x20 Bolt
      • (1) M12x70 Bolt
      • (1) M12 Hex Nut
      • (2) M12 Washer
      • (1) Spring Washer
      • (1) Fuel Line Relocation Clamp
      • (1) Self-Tapping Screw
      • (2) Grease Satchel

      Tech Specs


      Customer Reviews (18)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 18 customers

      Installation Time: Full Day

      Installation Cost: $250-$500

      • December 19, 2018

        5 2013 GT - JesseH Installation Time: Afternoon

        Mustang GT Whiteline Watts link

        Amazing product fit to finish. Well fabricated. The powder coating looks great. Definitely check out Whiteline products before buying anything else for your suspension

        Helpful (6)
      • December 17, 2018

        5 2014 GT - Slowrollen Installation Time: Full Day

        Whiteline watts

        Awesome product, makes the body and chassis feel more like one . It took out the body sway in the twisties and When accelerating hard rowing through the gears. Before the watts system It felt more loose on one side than the other and it removed that feeling. It’s now solid when banking left to right. Only complaint is I had no instruction with the kit. it also took a lot more than just 2 qts of diff fluid to fill if your going to fill it untill it comes out the top plug hole on the diff cover so grab extra. I would say time to install a full day because I broke most the tools needed trying to get the car apart and also broke a bolt when torquing some of them down. It is an easy install tho It just took time. Well worth it and it looks sexy

        Helpful (5)
      • September 02, 2018

        4 2014 GT - fuelforfire87

        Quality watts link with a few minor issues

        Was very excited to install a watts link on my car so it would handle better and keep the rear axle centered. I went with the whiteline unit because it looks the best out of all the watts links for the s197 in my opinion, and it has a good reputation with companies like vorshlag using it with good results. Install wasn't too bad, although the instructions tell you to do things a bit backwards. Best way to do it is to get the diff cover installed and fill it with fluid before connecting the rest of the components. I did run into one issue while installing the center pivot support. The bolt just to the left of the center pivot (M12 x 20mm) is supposed to be torqued to 40 ft*lbs per the instructions. I followed these instructions and ended up stripping the bolt hole. Searched the forums and this seems to be a common issue with this watts link. Luckily I was able to get a slightly longer bolt from the local hardware store and there were still some threads left in the hole that I was able to tighten it sufficiently. So if I had to do it all over again I would not torque that bolt and just put some loctite on it and get it tight with a 3/8" drive socket. Another pain was getting the arms adjusted after everything was installed. The driver's side bar is easy to adjust, the passenger side, not so much. Tightening the jamb nuts was a pain, but I finally got it. Its easier to tighten them if you remove the support brace, which i did. I haven't had a chance to test the watts link much but I think I can tell a bit of a difference when going over bumps. This is definitely not a cheap mod, but its worth it to get rid of the negative aspects of having a solid rear axle car.

        Helpful (9)
      • July 15, 2018

        5 2012 GT - MichaelT

        Wheel hop nonexistent

        Mustang came with Watts Link, put about 60 thousand miles on it, hard launches, rolling burnouts, San Diego back roads (Sunrise Highway). Car stays planted, good set up with the orange Koni Shocks and Struts. Look on YouTube at Dude in Blue Watts Linkage. Must on live axle Mustangs

        Helpful (14)
      • June 30, 2018

        4 2010 GT - ArmyGrunt Installation Time: Weekend

        Not as easy you might think

        Not totally satisfied with the quality. Took me far longer then it should of. Screwing the bolts in to the rear end cover felt like I was cutting new threads the whole way in. One actually stripped out the threads, the bolt never got tight enough to stop the washer from spinning freely. Had to tap the hole with 1/2 tap and a1/2 inch bolt cut down enough to not bottom out. Then the brace was too long or the holes not drilled in the right place. Had to drill and file the holes to get the passenger side holes to line up. Other then that every thing else went smoothly. Looks good and did improve the handling. Would buy again but I now know what I am getting.

        Helpful (13)
      • May 16, 2018

        4 2005 GT - JimB

        Nice Addition

        Install was straight forward. I was very pleased with the ride and handling. The best way I can describe it was that the car felt smoother thru the corners. I haven't experienced any additional noise but I probably only have 500 miles on the car since the install. Great looking but you will never see it.

        Helpful (9)
      • May 10, 2018

        5 2013 GT - Famine Installation Time: Full Day

        Does not work with steeda sway

        This was the best suspension mod to date; however i had to modify the passenger side link for my steeda sway bar to make it all work. Either plan ahead for this and get one that works or be prepared to do some grinding. Therefore, install time took me longer.

        Helpful (9)
      • March 11, 2018

        5 2013 GT - JoseN Installation Time: Full Day

        Whiteline wattslink,great

        The setup isgreat and took me a little to long for a first time install, the Instructions are straight forward. Since it was my first try kept forgetting, not to jump ahead of steps. The stock fill plug is useless since new cover has a filler plug in back. Took longer to fill oil. But after a long day the car feels different. Great. Now I know it is great investment, now I can lower my mustang.

        Helpful (11)
      • August 24, 2017

        5 2014 V6 - NickySixxer Installation Time: Afternoon

        Best modification available!!

        So first of all, the install was not too terrible what so ever. I was alone and it took my four hours with a jack 2 stands and all hand tools. Make sure you get diff fluid before you begin the install though! That aside, I don't know why Ford let their mustangs leave without this product on the car. It's absolutely transformed the feel. It's more comfortable on the freeway and around town, way more predictable in corners, and turns absolutely amazing. 5 star no brainer.

        Helpful (15)
      • May 29, 2017

        5 2012 GT - Stainless Installation Time: Afternoon

        Feels like a different car

        Give yourself a full day to install this and take your time. Read the instructions prior and obtain all of the required tools and products required to keep your stress level at zero. Save all of the factory hardware because you will need to reuse some of it. The instructions are a little vague in some areas but if you have any mechanical ability you will be able to get through it with no problems. The fit and finish it top notch. The ride feels much smoother, better held together and even dampened. I took it on some hill climb twisty's and felt very confident. It's still new to me but I'm loving it so far!

        Helpful (13)

      Questions & Answers (23 answers)

      5 Top Rated Questions

      Will this fit on a V6 differential?

      • The Whiteline Complete Watts Link Rear Suspension will fit V6 models equipped with the 8.8" rear differential. 7.5" differential cars will be incompatible.

      Helpful (3)

      Can I use this with the BMR Xtreme Rear Sway Bar Kit?

      • The Whiteline Complete Watts Link Rear Suspension will work with the BMR Xtreme Rear Sway Bar Kit

      Helpful (3)

      Swarr Bar compatible? Can a swarr bar be installed along side the watts link setup? swarr bar Item # 80801 for reference Thanks

      • Yes the Swarr rear end support will fit with this Watts Link. The Swarr support sits below the differential and out of the way of the Watts Link.

      Helpful (3)

      2013 GT500 fitment. Can you explain how the oil lines from the track package work with this? Very interested but not getting how the watts link will work with this setup.

      • The Whiteline Complete Watts Link Rear Suspension would not be compatible with the Differential Cooler.

      Helpful (1)

      will it fit to Ford Performance Rear Sway Bar M-5490-A ?

      • Yes, The Whiteline Complete Watts Link Rear Suspension will indeed work with a Ford Performance Rear Sway Bar (M-5490-A).

      Helpful (1)
      10 More Questions
      I have a 2013 GT500 equipped with the SVT Track Package so it has oil lines that connect to the rear differential cover for the purpose of pumping the differential oil to the front where the oil is cooled and then returned back to the rear differential. Does this Watts Link allow the oil lines from the Track Pack to connect to the new differential cover? 1 answer
      The description says "adjustable ride height." This isn't what I'm thinking is it? I mean can it lower the car or is this something else? Thanks! 1 answer
      How would it affect the occasional drag race? 0 answer
      Will this fit a 2006 GT convertable 1 answer
      I would like to know if this is one piece or can be disassembled? Would also like to know the final package dimension. Thanks, Jeff 1 answer
      Ok, this is not for convetible, i get it. so if i want to have (about) the same effect with this product, what would be the alternative? I mean for convertible. please link me from the product in thanks! 1 answer
      do i HAVE to drill anything for this job, because i dont drill on my car 1 answer
      I have a 2013 GT with the track package. Will this work with the track pack or will I need to choose between the two? And if not, then which is better, the whiteline or the track pack? I currently have 3.15 gears but am upgrading to 3.73. It's automatic if that makes any difference. Only one leg so cant drive stick very well. 1 answer
      Would this product be compatible with an air ride suspension? 1 answer
      Can I use this watts link with a RTR rear swaybar? 1 answer

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